Roasting apparatus



Dec. 7, 1937.

A. C. WALDVOGEL RoAsTING APPARATUS Filed April 18, 1954 4 Sheets-*Sheet l l. f ,fai

Dec. 7, 1937. A. c, WALDVOGEL ROASTING APPARATUS Filed April 18, 1934 4 Sheets-Sheet 2 Dec. 7, 1937.

A. c. wALDvoGEl. 2,101,417

ROASTING APPARATUSA Filed April 18, 1934 4 Sheets-Shea?l 5 Fig- E- DeC- 7, 1937 A. c. wALDvoGl-:L

ROASTING APPARATUS Filed April 18, 1934 4 Sheets-Sheet 4 Patented Dec. 7, 1937 UNITED STATES PATENTO `'OFFICE Albert o. Wa1avg1',mchmena nennt, Mo.

Application April 18, 1934, Serial No. 721,093

21 Claims.

This invention relates to roasting apparatus, and has special reference to roasting apparatus designed and adapted for use in roasting coffee and the like.

Objects of the invention are to provide an improved roasting apparatus for use in roasting coffee and the like, including a rotary measuring receiver arranged to receive and deliver measured supplies of coffee into a rotary roaster; to provide means for moving or rotating the roaster and for stirring, agitating and mixing the coffee therein in order to roast the coffee uniformly; to provide means for removing and discharging the roasted coifee from the roaster; to provide improved mechanism for removing impurities and other substances from the roasted coffee; to provide improved means for synchronizing and timing the operations of the diiferent operative parts of the invention in order to obtain the intended results; and to obtain all of the advantages and improved operations herein 4 Fig. 1 is a vertical sectional view approximately f on the irregular sectional line I--I of Fig. 3.

Fig. 2 is a similar irregular sectional view considerably to the right of the line along which the` section of Fig. l is taken.

Fig. 3 is an elevation of the mechanism, one wall of the casing being removed and parts being shown in section.

Fig. 4 is a cross sectional view of the casing enclosing the rotary 'measuring receiver, said receiver being shown in end elevation.

Fig. 5 is a view showing an appropriate electric circuit mechanism and devices controlled thereby for operating the different parts of the invention in synchronism and timed relationship.

The principal parts of the invention are enclosed in a. casing I having in the upper portion thereof a hopper 2 arranged to receive and contain a considerable amount of unroasted coffee. The hopper 2 has a chute 3 opening into a cylindrical casing 4 enclosing a hollow cylindrical measuring receiver 5. The cylindrical measuring receiver 5 has through one side thereof an opening 6 (Figs. 3 and 4) through which the coffee may pass into said measuring receiver when said opening 6 isin communication withthe chute 3. The measuring receiver is attached to a rotary shaft 1 journalled in bearings in connec- .tion with the end walls of the casing 4. A sprocket wheel 8 is attached to one end of the shaft 1 and is engaged by a sprocket chain 8 that also engages a sprocket wheel I attached to the shaft II of a modulating motor I2. Therefore, when the motor I2 operates the measuring receiver will be rotated from and to Aposition in which the opening 6 is in communication with the chute 3. 5 The under side of the casing 4 opens into a chute I3 communicating with an opening I4 through a wall I5. i

The opening I4 lis into a rotary roasting chamber. Said roasting chamber comprises a per- 10 forated cylindrical wall I6, an end wall Il and an opposite end wall I8. A bearing device I 9 supports the end I1 of the rotary roasting chamber for rotation about the open end of the chute I3. A shaft 28 attached to the wall I8 is rotatively 15 journalled in a bearing mounted on the support 2I and lhas a sprocket wheel 22 attached thereto. A sprocket chain 23 engages the sprocket wheel 22 and also engages a sprocket wheel 24 attached to a shaft 25 driven by gearing 28 operated by a 20 motor 2l. The sprocket chain 23 also engages a sprocket wheel 28 attached to a shaft 28 rigid with a rotary end wall 38 attached to a rotary cylinder 3|. A

A clutch member 32 (Fig. l) is rigid with the 25 shaft 28. A conical l'element 33 is mounted forsliding movements along a support 34 in axial alinement with the shaft 28 and has on its inner end a clutch member 35, adapted to bevmoved into and out of engagement with the clutch member 32, and on its outer end an operating crank 36. When the clutch member 3l is engaged-with the clutch member 32 and then rotated by the crank 38, the roaster chamber Il will be rotated in the direction of the arrow 3l.

'I'he conical member `33 is engaged by the terminal 38 .of a iiexible rod or shaft 39 mounted for sliding movements ina supporting tube 48 and having on its inner end a head 4I. A block 42 also engages the cone 33 and is attached to the 40 outer end of a flexible rod or shaft 43 mounted for longitudinal sliding movements in a supporting tube 44 and having its inner end pivoted to an arm 45 attached to the pivot 48 of a gate 41. When the conical member 33 is moved inwardly 45 the rod or shaft 39 is moved inwardly to place the head 4I adjacent to the under side of a lever 48, which is mounted on a pivot 49 and actuated downwardly by a spring 50. When the head 4I is raised and held adjacent to the under side of the 50 lever 48, said lever will be SuDDOrted against operation by the spring 3l.

A cam 51| is attached to the shaft 1 and is engaged by a roller 52 supported by the lever 43.

The high point of the cam 3| is up during the 55 ceiver 5 is in registration with the chute 3. When the shaft l Vis turned, the'cam 5l is turned with the shaft and the spring 55 moves the leverl5 downwardly. When the head 5l is moved to its raised position, it will raise the lever 55 and support said lever in its raised position irrespective of the position of the cam 5i; and, when the head di is in its raised position, it will prevent operation of the lever d@ even though the cam 5i operates.

A link 53 has its upper end connected with the lever i8 and its lower end connected withl an arm 55 attached'to a door 55 mounted on a rocking pivot rod 55. In the raised position of the lever 58, the door 55 extends through the upper end of the chute 5l and will cause the coiee to pass from the chute l5 into the rotary roaster i5. y

Series of curved or spiral flights or baies 55 are attached to the inner side of the rotary roaster i5 and will discharge the roasted coffee continuously and regularly onto the inclined door 55 and thereby cause the roastedofee to pass into the chute 55. It is to be understood that the door 55 is supported in such inclined position extending into the rotary roaster all the time that the lever 5b is supported in its raised positioneither by the cam 5i or the head di.

When the clutch 35 and cone member 53 are moved inwardly to engage the `clutch member 55 with the clutch member 32, the rod or shaft l5 swings the gate il from the position in which it is shown in solid lines in Fig. l. to the position in which it is shown in broken lines extending across and closing the chute 5i below the door opening. When the gate 5l' isA moved tothe dotted line position and closes the chute 5l, the roasted coee discharged from the heated roasting chamber i6 is eaused to pass through a discharge opening 59 ihto a receptacle 55. The rods or shafts 39 and 43 may be actuated outwardly by any known or appropriate actuating means.

The coiee is discharged from the chute 5l into a cooling chamber Si, one wall of which is a screen 5g and the opposite Wall 55 of which is perforated. l Y

A pipe 65 has its lower end opening into a blower 55. and its upper end opening'into a suction chamber 65 enclosing the wall 53 and also enclosing a screen 5l. When the blower is opber 5i and discharged :from the blowerthrough an outlet 58.

A gate valve 55 closes the lower end of the cooling chamber and'ls mounted on a pivot rod l0. A counterweight li connected with the gate valve ,moves said gate valve to closed position in which it is held by a latch l2 to support the coffee in the cooling chamber. At'the proper time, the latch 'i2 is withdrawn by an lelectromagnet 'i5 to permit the coiee to open the gate valve 5S and pass through a chute l5 into the lower end of a tubular passage 'i5 extending upwardly and having its upper end opening into a hopper l5. A screen il is mounted in connection with the passage 'i5 below the opening from the chute '16. Such ofthe heavier foreign subamateur time that the opening 6 into the measuring restances as will not be drawn through the passage "l5 by suction may drop onto and through the screen 'Ell into a receptacle 118.

Upward' suction through the passage 'l5 is created by the blower 65 through a passage |5- having -its upper end opening into the hopper l5 into which the upper end of the passage 15 opens. The lower end of the passage 'le opens into the pipe Ell. A gate valve is attached to a. rocking support t i' and is movable from position in which it closes the lower end oi the passage l5 to position in which it closes the pipe 65 above the opening'into the passage l5 and vice versa (Fig. l). An arm 82 attached to the rod 3l is connected to a magnetic armature 83 and is operative to rock the rod 5i -tomove the gate valve to its diierent adjustments.I Thus, when air is drawn through the pipe 65, the passage 'l5 is closed by the' gate valve 85. When air is to be drawn through the passage 79 to create upward suction through the passage l5, the gate valve t@ is moved from the passage l5 to positionto close the pipe 65.

A screen 85, mounted in the hopper l5 between the opening from the passage l5 and the opening into the passage l5, prevents the coiee from being drawn into said passage l5.

A gate valve 85, mounted on a pivot 55, closes the opening through the bottom of the hopper l5. This valve is moved to closed position by a counterwelght 5l and is supported in closed p0- sition by a latch 35 released by an electro-magnet 55. Whenthe latch 58 is released, the weight of the coee in the hopper l5 will open the gate valve 55 and the coiee will pass through a chute @il into the rotary cylinder 3i. The cylinderii has an end wall 9i opposite the end wall 55 and is supported by a bearing device 52 on the open end of. the chute 95.

The shaft 56, which supports the door 55 to control pamage of the coffee from the chute i3 into the rotary roasting chamber l5 and to control discharge of the roasted coee from the roasting chamber into the chute 5l, also extends acrossA the open lower end of the chute 55 and supports a door 93 in all respects like the door 55 and operated in like manner to discharge coee into the cylinder 5i and to discharge coffee from said cylinder 5l into a chute 95 opening downwardly from the lower end of the chute 55 and having a discharge end 55 outside the casing i.

Heat forl heating the roasting chamber is generated by a burner i2i to which fuel is supplied through a'pipe l2 controlled by a valve l23 operated by an electro-magnet E25 energized by the electric circuit, as shown in Fig. 5. It is immaterial from what source the heat is obtained and I do not restrict myself to the use of a device for utilizing combustible fuel for that purpose. Obviously, any known type of heater may be used, such, for instance, as an electric heating device.

Heat is confined around the chamber i5 and the'rotary cylinder 5i by an insulated cover E25.

The previously` described mechanisms are synchronlzed by mechanism now to be described, Although electrical mechanism is shown, it is Understoodthat other similar mechanism could be used.

The mwer is derived from two power lines 95 ff and 5l.. Three main circuits, intercontrolled as will be shown, operate from these power lines.

The rst main circuit includes lead 55 and return 03 i-designated thus, although alternating current preferably is used. Lead i353 dividesv at lllinto lead E35, through motor 2l, thence through une ist, to panties, une sse, man

' motor |05, so that further means must be pro-v ||6,J line |31, and into return I3I at point |38. It will be seen that switch I I6 controlsthis circuit.

T'he other branch of lead |30, from point |32, is lead |39, branching at |40 into lead I4 I, the motor |05, line |42, to the point |43, line |44, to point |45, whence it passes into line |46 that joins lineroasting and cleaning cylinders I6 and 3|, theV motor |05 controlling the switches, and the gas valve |24 are all in parallel, and are allcontrolled by thel switch I I6, which last is controlled by its cam |I0. This cam is controlled in turn by the vided for energizing these mechanisms when the cam switch I I6 is open. To this end, a switch controlled by coffee in the hopper is provided, which switch is also subject to manual control.

This last mentioned switch is in parallel withA the switch II6, and hence also controls each of the devices controlled by the switch H6. -I-ts circuit is as follows: from point |45, that is on the line side of Jthe motor l21, the motor |05 and the valve |24, extends a line |50. This line passes through a mercury switch I 5 I pivotd to the hopper 2 and controlled bythe arm |02 connected to the plate IOI within the hopper. Hence the presence of coffee in the hopper depressies the -plate |0|, swinging the arm |02 upwardly, and closingv the switch I5|= as well as the switch 99. These switches may also be thrown manually.

From the mercury switch I5 I, the circuit includes line I 52, that joins return |3| at point |38. By this circuit, whenever the vswitch |5I is closed, the three mechanisms are energized regardless oi the position of the cam switch U6.

The second of the main circuits includes a lead |60 and a return |8I. Lead |80 branches at |62 into lead .|63 through cam switch. II5, thence through lead |64, to point |65. At point |55, the

lead branches so as". to put the solenoids 13 and |20 of the valves 'I2 and 03 respectively, in circuit in parallel. To this end, from point |85 branch leads |66 and |61 to Solenoids 'I3 and |20 respectively; and from said solenoids extendlines |68 and |69 respectively. that join at |10 into line` m, and at m menne m joins return m. Another circuit controlled from lead |60 is as follows: from point |52 brancheslead |13. This in turn branches at |14 into lead |15, through cam switch ||4, lead |16, the motor` 55, line |11 and to return |6I at point |12. v

A third circuit controlled from lead |80 is as follows: from lead |13, at point |14-branches`leacl |18. This passes through cam switch H3, lead |19, through the solenoid 89 of release", through simultaneously under control of switch H5; theA blower ymotor 65 operates under control of switch II4; and the cleaner hopper release 89 operates under control of switch II3. Since each of these switches is controlled by synchronizing motor l|05I these several mechanisms are operated by said motor. They therefore are under control of the switches ||6 and |5| that control the motor |05.

The third main circuit from the power lines 96 and 91 includes the leads |90 and I9I. Lead |90 passes through the primary of the transformer 93 and thence to return |9|. The transformer reduces the line voltage for operation of the modulating motor i2.

This motor l2 of itself forms no part of the invention. Itis designed to operate rst in one di-v rection for 180, and then in the opposite direction 180, to actuatc the measuring cup 5.- However, it could operate in 180 intervals in a constant direction. For illustration, it may be considered as having internal switches that are automatically opened (as by cams) after a single 180 of operation.y The motor includes two circuits, one for operating the cup from the up, or charge position, to the down, or discharge position, and the other for operating the cup from the down to the up position..

Both of these circuits are connected in parallel,

to the secondary lead |92, and the secondary re-f turn line |93. In the first instance, as for operating the cup into the up position, the circuit goes from the secondary lead |92, through the internal switch, .thence through line |94, the cam switch II1, line|95 to joint |96, thence through line |91 into the motor I2 and out the secondary return |93. This circuit obviously is controlled by the cam III, and synchronizes the time of operation of the cup to turn up to be recharged.

The circuit for turning the cup down is as follows, it being understood that the motor I2, as soon as the cup reaches its charge, or up, position automatically cuts its internal circuits over for operation in the reverse direction; the secondary lead |92 goes through this other internal circuit of motor I2, out through line |98, through series mercury switch 99, through line |99, cam switch H3, and line 200 to point I 96, whence it follows the common return |91 into the motor I2 and thence to secondary return line |93. It will thus be seen that the cup 5 .will not turn from its charge to its discharge position unless both the switches, 99 and |I9, are closed, so that the cup is under control of the synchronizing motor |05, and the coffee present in the hopper 2. It is to be remembered, however, that the switch 99 may be thrown manually.

The operation of the device is as follows:

At the stopping position all switches are open as shown in Fig. 5. Hence the entire mechanism is inoperative. To start the device, coffee is placed inthe hopper 2. The weight of this coiiee depresses the plate |0I closing both the switches 99 and I5 It will be understood that these switches may be thrown manually, if desired. Normally however, they are biased to open position. Closing of the switch 99has no immediate effect, since the circuit of the motor I2 is open at switch II8. The closing of the switch |5| puts the motors 21 |05 and the gas valve |24 into circuit despite the'fact that at this time the switch I I6 is open. Hence the gas valve |24 permits gas to flow to the burner, where it may be lighted. The motor 21 starts both of the cylinders IIiand 3| to rotating, and the motor |05 rotates the various cams in a counterclockwise direction. It may be assumed at this time that there is no coffee in any part of the mechanism. Very shortly after the' motor |05 starts operation, the cam IIO will move to close the switch I I6, thus closing the sustaining circuit to hold the motors 21 and 05 and the gas valve to the switch I5|.\ 'I'his action does not take place |24 in operation regardless of what may happen immediately for reasons to be shown, but does take place in a very short while. It will be understood that these various circuits are closed from the lines |34, |54, and |46, through the line |96, the switch ||6, the line |31 and into the return |3|,atpoint|38.

At this time, the measuring cup 5 may be considered as rotated to position wherein its opening 6 is turned downwardly to the discharge position. From the drawings it will be evident that it will remain in this position/throughout a substantial period of time. Since the cams rotate counterclockwise and the up cycle of the modulating motor i2 is controlled by the cam |I| and the switch Ill, it may be seen that this period of time can be substantially over half of the time of a complete cycle, although, of course, the time can be varied. Hence when the machine is put in operation, it will remain empty of coifee until the roasting cylinder I6 has time to become suitably heated in the burner l2 I After this Warnung up period is passed, the second step in the cycle is for the cam I I to close the switch ||1. This energizes the motor i2 to turn the measuring cup 5 upwardly to its charge position, the circuit of the motor |2 being from secondary lead |92 through the now closed internal current of the motor |2 to line |94, through the switch II1, line |95, the common line |91 and the secondary return line |93. The motor I2 will then turn the cup upwardly. The motor I2 operates slowly so that the cam I Irmust be of suflicient arcuate length to hold the switch ||1 until the cup is all the way up. A A y When the cup reaches its up position, the cam 5| will engage the follower 52 and through .the linkage mechanism will shift the gates 55 and 93 to the position shown in Figs. l and 2 Awherein they discharge coee from their respective cylinders. This operation has no significance at this stage, since the cylinders are empty. VAs soon as the motorv I2 has rotated the cup 5 to its up position, the motor automatically shuts offr to its internal mechanism, which internal mechanism,

thenoperates to be ready to rotate the cup down.

With the cup in its upward position, coi'ee will then flow from the hopper 2 through the chute 3 into the cup until itlls the cup. This takes a certain length of time during which the cam ||2 is moving over toward the position to close the switch H8. If the hopper contains enough coffee for a complete ll, the switch 99 will be maintained in closed position by the plate |0I. Then when the cam I I2 does close the switch I I8, the motor will then turn the'cup down. During this operation, the circuit to the motor I2 operates from the secondary lead |92 through the motor I2, the line |98, the switch 99, line |99, switch IIB, the line 200, the common return |91 and through the motor I2 to the secondary line |93. The cup will then slowly rotate to its down position. As it does so, the cam 5| leaves its follower 52 so that the spring 59 through the' link mechanism will shift the gates 55 and 93 out of their respective cylinders. The gate 55 now closes off the chute 51 and directs coffee discharged from the measuring cup into the chute I3 into the cylinder I6, which cylinder of course is constantly rotating.

As there is no coiiee in the remainder of the system, the operation of the several cams I 01, |08 and |09 is of no significance at the present time. The charge of coffeewill remain in the cylinder I6 roasting until the cam III can throw the cup vagainst the gate 85.

aromi? now roasting in the cylinder I6 is discharged into the chute 51 during all the time that the cupis up. The cup will remain up for the interval from shortly after the closing of switch ||1 and shortly after the closing of switch |I8'as determined by the cams |I| and ||2. This time is suicient to The Y valve is now in position shown in Fig. 1 Y

so that air is drawn by the blower through the cooling chamber 5| to cool the first charge of coiee'now roasting therein. After a short period, the cam |09 will close the switch I l5. This simultaneously energizes the solenoids 13 and |20 by placing them in circuit with the lead |60 and the line |5I. Energization of solenoid 13 releases the bottom gate 59 so that the coee within the chamber 5| will overbalance this gate and fall into the stoner compartment o'ver the screen l1. Simultaneously`the Y valve 80 Vshifts to suck air upwardly through the conduit 15 across the hopper. 16. and downwardly through the conduit 19. This assistsl in drawing the coffee into the stoner compartment and subsequently lifts it-freed of stones., etc., into the hopper Y16 where it rests As soon as all the coffee is discharged from the air chamber 6|, the counterweight 1| again closes the gate 69. After a short interval; of suiiicient duration to permit all the coffee from the cooling chamber 6I to be lifted into the hopper 16, the switch I I5 again opens, whereupon the release 'I2 again holds the gate 69 closed and the Y valve 80 returns to the position of Fig. l'. Shortly thereafter'the blower motor is out olf by the action of the cam |06. The cam |01 then closes the switch I|3 to release the gate of the hopper 16 and coee falls into the cleaning cylinder 3|. It will be remembered that the cup 5, at this time, isiin the down position so that the gate 93 is outside the cylinder 3| and directs coifee therein.

The coiiee will remain in the cleaning cylinder until the gate 93 shifts to the position of Fig. 2. This will not take place until the cup 5 again shifts upwardly by the return of the cam III to the position to close the switch |`|1, thus recommencing the cycle for the third charge of coffee. When this occurs, the first charge is discharged from theA cleaning cylinder 3| into thechute 9| and the discharge outlet 95. It will be understood that simultaneouslyrnow thelsecond charge of coifee, now roasted, is discharged into the cooling chamber 6|, following which a third charge is dumped from the cup into the roasting cylinder. Whenit is desired to stop the mechanism, the mercuryv switch, including the bulbs 99 and I5I, may be thrown manually. If, however at this time, there is a charge of coifee already in the roasting cylinder; the cam IIO will be in position to sustain the several circuits of the motor 21,

the synchronizing motor |05 and the gas valve V |24 until after the coffee has been discharged from the several cylinders. The discharge from the roasting cylinder is effected when the cam I 09 closes the switch H5. The cam l|0 will remain closed until after the coffee is drawn by the blower up into the hopper of the cleaning cylinder and also after the release from this hopper operates to discharge coffee into the chute 90. However, for reasons now to be shown, the coffee will not go into the cleaning cylinder.

When the mercury switch is open, the switch element 99 is also open. This prevents closure of the circuit for the down cycle of the modulating motor I2 by breaking connection between lines |98 and I99. Hence the cup 5 may not turn down Sending an additional charge of coffee into the roasting cylinder, although the discharge of the former charge of coffee from the roasting cylinder goes on as previously described. In other words, the cam switch Ill will duly turn the cup 5 up where it will remain because the down circuit is now held open bythe switch 99. With the measuring cup thus in its upward position, the'cam 5I will hold the gates 55 and 93 inside their cylinders and in position to discharge their contents; and they will remain in this discharge position. Therefore the previously described charge from the cleaning cylinder hopper 19 cannot get into that cylinder but is directly discharged into the outlet 95 through the chutes 90 and 94. Shortly after the cam |01 closes the switch I I3 and permits it again to open, the cam H opens the switch I IS to break the sustaining circuit and the entire machine stops. Thus it is seen vthat the machine cannot be stopped without completely roasting a charge of coffee. This point is significant since it prevents partially roasting the coffee at one operation and then completing it at another which would tend to produce ununiform roasting.

During the operation of the device, should at any time there not be enough coffee in the hopper 2 to completely ll the measuring cup 5, the plate IOI will shift upwardly again to open the switches '99 and I5! This will prevent the measuring cup from discharging a partial load into the roasting cylinder, such partial loads having a tendency to burn. However, at this time, the sustaining switch IIB will have been closed by the cam IIB to complete the cycle for previous charges, with the exception of the cleaning cylinder operation.

In beginning the discussion of this description, it was assumed that the device was going through a series of continuous operations. Therefore it was assumed that the cup was in the down position. As a matter of fact, after the machine is stopped in the manner heretofore described,`

either by manual operation oi' the mercury switch to the open position or by their automatic operation by failure of supply of coiee in the hopper 2, the measuring cup will have been held in the up position since the down circuit was open. This is the position when the machine is started anew.l

Hence when the cycle is initiated, the entire machine is empty and loading of coffee into the hopper v2 closes the mercury switches and immediately fills the measuring cup. When the cam I I I then subsequently closes the switch II'I, which normally operates the motor I2 to turn the cup up, the motor will not operate since, as heretofore described, the internal circuits of the motor open as soon as 180,o rotation is effected. Therefore this diierenceof having the cup:l up does not change the cycle"V from that of continuous operation. However, it will be noticed that the start of the machine finds the cam II2 in such position that the switch I I8 that closes the down circuit to charge coffee into the cylinder will not be closed for some time. Therefore the machine will operate empty for a period during which the roasting chamber can become .properly heated.

Should the machine be stopped, as by interruption of the power, the coffee may be discharged from the roasting chamber I6 by manually rotating said chamber by means of the clutch 35 and crank 36, at the same time preventing discharge of additional coffee into the roasting chamber by raising and supporting the head under the lever 48. 'Ihe coffee manually discharged from the roasting chamber will be passed through the opening 59 into the receptacle 60.

It is now apparent that this invention obtains all of its intended objects and purposes efficiently and is a complete self-contained coffee roaster and cleaner and is automatic in its operations. The mechanism for synchronizing and timing the operation of the devices is an important feature yof the invention, and the disclosure should be sulcient to enable anyone skilled in the art to make and operate the device.

I do not restrict myself unessentially in any particulars but contemplate such variations as are within the scope of the appended claims.

I claim:

1. A roasting apparatus comprising a rotary measuring receiver, a rotary roasting chamber, a chute for conducting coffee and the like from said receiver into said roasting chamber, a chute for conducting coffee and the like from said roasting chamber, a single means controlling delivery of coffee and the like from said first chute into said roasting chamber and from said roasting chamber into said second chute, mechanism for rotating said chamber, and devices operated by said mechanism for operating said controlling means to a pos-ition to deliver coffee into said roasting chamber only when said receiver is in its discharge position.

2. A roasting apparatus comprising a rotary measuring receiver, a. rotary roasting chamber, a chute for conducting coffee and the like from said receiver into said roasting chamber, a Chute for conducting coffee and the like from said roasting chamber, a gate movable to extend into or out of said rotary chamber and in its several positions controlling delivery of coffee and the like from said first chute into said roasting chamber and from said roasting chamber into said second chute, mechanism for rotating said receiver, and mechanism operated by said mechanism and in synchronism with said rotary measuring receiver controlling the operation of said means whereby to veiiect passage of coffee and the like from said first chute into said roasting chamber and from said roastingchamber into said second chute.

3. A coffee roasting apparatus comprising a rotary roasting chamber, a rotary stoner, a rst l mechanism for rotating said chamber and said being connected with said second mechanism to.

operate simultaneously therewith.

4. In a coffee roasting apparatus, a rotary roasting chamber, diverging and communicating chutes for conducting coffee into said chamber and from said chamber respectively, a device controlling passage of coee from one of said chutes into said chamber and from said chamber into the other chute, mechanism for rotating said chamber and for operating said device in a timed vrelationship to control passage of coiee discharged from one ci said chutes into said chamber and to discharge coee from said chamber into saidv second chute when said rst chute is empty, a cooling chamber arranged to receive coiee from said second chute, and a device controlling said second chute for discharging coiee therefrom into said cooling chamber or not as desired.

5. In a device of the kind described, a processing chamber, a discharge outlet therefrom, a second processing chamber having' an entrance above said discharge outlet, a. receiving chamber above said entrance, and air flow means connecting said discharge outlet with said receiving chamber including a blower, a ow conduit from said second chamber to said receiving chamber for transmitting the material discharged, and a return conduit leading back from the receiving chamber to the blower, cut-oi means to prevent iiow through Vthe flow conduit,

-ircm the measuring device to the processing mechanism, motive means including a rotary member for operating said measuring device, a cam on said rotary member, and means actuated by said cam to operate said gate in synchronism with the operation of the measuring device, so that the gate does not block the passage when the measuring device is in discharge position.

'7. In a device of the kind described, a measuring device, a processing mechanism, a conduit between the two, said measuring device being movable to a position wherein it discharges into the conduit, and to another position where it does not, discharge means leading from said processing mechanism, a gate in said conduit, andv means operating said gate into one position wherein it directs ow from the measuring device into the processing mechanism and simultaneously closes oil' said discharge means therefrom, and to another position wherein it directs iiow from said mechanism into said discharge means, and means interconnecting said gate and said measuring device so that the gate is moved into position directing ow into the processing mechanism when the measuring device is in discharge position. A

8. In a coffee roaster, a cooling chamber, a stoner, mechanism for rotating said stoner about a horizontal axis, conduit means for conveying said coil'ee from said cooling chamber to said stoner wherein it is cleaned, a receptacle in said conveying means to receive foreign objects deposited therein and thereby separated from said coiee, and means for discharging said coilee from said stoner. l

`9. Ina device of the kind described, va roasting chamber, a stoner, each having an entrance opening, a gate controlling each of said openings, a single shaft upon which both gates are mounted, and mechanism for operating said shaft to move both gates simultaneously.

10. In a device of the kind described, a roast- I ing chamber, a stoner chamber, ingress and egress passages for each, and a valve for each, each valve being designed to prevent` egress and simultaneously in egress, or ingress positions relaroasting chamber, and a synchronizer including simultaneously provide ingress into its respective chamber, or to direct egress therefrom and. simultaneously prevent ingress, and said valves being mechanically interconnected, whereby both are tive to theirA respective chambers.

11. In a device of the kind described, a measuring device, motive means operating the same, a roasting chamber and a stoner chamber, a driving mechanism for rotating said stoner chamber simultaneously with said roasting chamber, a gate valve for 'each chamber, and means controlled by said motive means for operating said two gate valves simultaneously whereby both valves simultaneously admit a charge into their l5 respective chambers.

l2. In a device ofthe kind described, a movable roasting chamber, electric means for moving the same, a blower, electrical control means for it, a. conduit communicating with said roasting chamber, electrically controlled cut-off means in said conduit, and a synchronizer having a plurality of switches with means for intermittently operating the same, for controlling said roasting chamber moving means, said blower and said cut-ofi means.

13. In a device of the kind described, a rotary roasting chamber, a rotary measuring chamber, a conduit between said two chambers, a cut-oi in said conduit, means including electrical devices for operating each of said rotary devices, and for controlling said cut-01T, switches controlling said electrical devices, and a synchronizer for selectively closing said switches so that said measuring chamber intermittently feeds into said conduit, said cut-oiat the same time permits communication into said roasting chamber, and said roasting chamber rotates.

14. In a device of the kind described, ameasuring device movable from receiving to discharg 40 ing position, a movable roasting chamber, a motor for moving said measuring device, a circuit for Said motor, a second motor for moving said'- roasting chamber, a. `circuit for said second motor, and synchronizing means controlled by said second motor when said second motor is` operating and controlling the operation of said rSt motor.

15. In adevice of the kind described, a measuring device, movable from receiving to discharging position, amovable roasting chamber, a motor for moving saidmeasuring device, a circuit for said motor, a second motor for said a third motor, said second and third motors being connected in parallel whereby to operate simultaneously, and said synchronizing devices including switchesadapted to control all said motors.

16. In a roasting device, a roasting means operable to roast material for a predeterminedl period, a synchronizing device automatically operable for a given cycle, a. blower device selectively operable to cool vthe roasted material or to convey it, said synchronizing device in its cycle irst operating said roasting means, then energizing said blower device to cool the material, then operating the blower device to convey the material to y a predetermined place, and after the material is conveyed, cutting off the blower device.

17. In a roasting device, a roasting means operable for a predetermined time, means including an electric circuit for operating said roasting means, two switches in parallel in said circuit.' whereby the circuit is broken only if both 75 switches are open, and means for maintaining one of said switches closed until the roasting operation is complete, once said operation has been started. y

l8 In a roasting mechanism, a rotatable roasting chamber, a motor for rotating the same, a switch, a motor for actuating the switch, said motors being connected in parallel, and the switch being in the circuit of both motors, said switch actuating motor having means to maintain the switch closed always until the roasting chamber has rotated for a predetermined time, and then to open the switch to permit both motors to stop.

19. In a roasting apparatus, a roasting charnber, a motor for moving the same, a synchronizing device, a motor for operating the device, and a gas valve with electrical means for controlling the same, said motors and said electrical means being connected in parallel, said synchronizing device including a switch in a junction of all said parallel circuits, and said switch being maintained closed by said synchronizing device after the roasting process is initiated, until after a. predetermined period of time, whereby to keep the roasting chamber motor, the synchronizing motor and the gas valve operating means all energized during said period.

20. In a roasting apparatus, a roasting chamber, a measuring device-movable to position to receive material, and then to position to discharge the same into the roasting chamber, a door controlling the passage of material into or out of vsaid chamber, means operated by operation of said measuring device to move said door to position to discharge material from the chamber when the measuring device is in receiving positicn, a cooling chamber adapted to receive material dis charged irom said roasting chamber, a cooling mechanism operable to cool the material in said chamber, and synchronizingv means to begin the operation of said cooling mechanism when the material enters said cooling chamber.

21. In a device of the kind described, a pair of cylinders, a gate for each cylinder, each gate being movable to one position wherein it directs material into the cylinder, and to another position wherein it directs material out of the cylinder, a common means for simultaneously moving said gatesinto corresponding positions with respect to their respective cylinders, a measuring device movable to charge material at intervals into the first of said cylinders, means operable by movement, of said measuring device to shift said gates so that when said measuring device is in its charge position, the gates are in position to direct material into the cylinders, means for periodically operating said measuring device, means for conveying material from said iirst cylinder to be discharged into said second cylinder, and means for synchronizing the operations of the measuring device and conveying means so that the measuring cylinder is in its position to place the gates in position to direct material into the cylinders when the coffee has been made available by said conveying means for said second cylinder.

ALBERT C; WALDVOGEL. 

